there is easily a 300lb difference in chassis alone, this is how significant weight is, a friend sat in my car when i raced a b13 with stock cams, i have an n15 with n1 cams, hands down i'm faster, my friend wasn't more than 180lbs at most, yet i lost the race by more than 2 car lengths, the n15 and the b13 are very close in weight, i've road raced a ek civic b20 making 228whp but with driver and passenger and even with possibly a clear 35whp from a dig to top end exceeding 130mph i still would walk on the ek so the weight will be a very telling factor. i think snickers did a very detailed write up on the topic on g20.net here
P10 and P11... Turbo VS. VVL... How to choose - G20.net - Forums
P10 and P11... Turbo VS. VVL... How to choose - G20.net - Forums